Since it's nigh on impossible to produce accurate figures of operating system usage, we have to make do with figures that provide a rough estimate, at best. One such set of statistics are the figures from Net Applications, which tracks the 160 million monthly visitors to its hosted websites. The latest figures from January 2009 have been published, and they show that the rise of Mac OS X continues, as well as that of the iPhone and iPod Touch. Unsurprisingly, Windows 7 did quite well too.